Excitation of surface-type X modes by charged-particle beams

1998 ◽  
Vol 60 (2) ◽  
pp. 413-420 ◽  
Author(s):  
V. O. GIRKA
Keyword(s):  
Magnetic Field ◽  
Charged Particle ◽  
Structural Parameters ◽  
Particle Beam ◽  
Charged Particle Beam ◽  
Surface Type ◽  
Charged Particle Beams ◽  
Steady Magnetic Field ◽  
Polarized Surface ◽  
Oriented Parallel

A theoretical investigation of extraordinary polarized surface waves at the second harmonics of ion and electron cyclotron frequencies propagating across an external steady magnetic field is carried out in the case of weak plasma spatial dispersion when the thermal velocities of plasma particles are much less than the phase velocities of the considered waves. These waves are eigenmodes of a planar plasma–vacuum waveguide structure that is situated in a steady magnetic field oriented parallel to the plasma surface. A cold charged-particle beam is assumed to propagate over the plasma interface. Excitation of surface X modes at the second harmonics of electron and ion cyclotron frequencies due to the beam–plasma interaction is studied analytically. The dependence of surface-type X-mode (STXM) growth rates on the considered waveguide structural parameters is also studied.

Excitation of surface cyclotron O modes by charged-particle beams

2002 ◽  
Vol 68 (2) ◽  
pp. 129-136 ◽  
Author(s):  
V. O. GIRKA
Keyword(s):  
Magnetic Field ◽  
Charged Particle ◽  
Particle Beam ◽  
Charged Particle Beam ◽  
Plasma Surface ◽  
Charged Particle Beams ◽  
Planar Plasma ◽  
Steady Magnetic Field ◽  
Polarized Surface ◽  
Oriented Parallel

A theoretical investigation of the interaction between a charged-particle beam and ordinarily polarized surface waves at the first two harmonics of ion and electron cyclotron frequencies propagating across an external steady magnetic field is carried out. The case of weak plasma spatial dispersion when the Larmor radii of plasma particles are much less than the penetration depth of these waves into the plasma is considered. The indicated waves are eigenmodes of the planar plasma–vacuum–metal waveguide structure, which is exposed to a steady magnetic field oriented parallel to the plasma surface. It is supposed that a cold charged- particle beam propagates over the plasma surface in the vacuum region. The beam density is less than the plasma density. Excitation of these O modes at the first and second harmonics of electron and ion cyclotron frequencies caused by the both resonant beam and dissipative instabilities is studied analytically. The dependence of their growth rates on parameters of the considered waveguide structures is also examined.

scholarly journals A Differential Algebraic Method for the Solution of the Poisson Equation for Charged Particle Beams

2014 ◽  
Vol 17 (1) ◽  
pp. 47-78 ◽  
Author(s):  
B. Erdelyi ◽  
E. Nissen ◽  
S. Manikonda
Keyword(s):  
Charged Particle ◽  
Algebraic Method ◽  
Particle Beam ◽  
Practical Implementation ◽  
Convergence Region ◽  
Charged Particle Beam ◽  
Particle Beams ◽  
Charged Particle Beams ◽  
Poisson Solver ◽  
New Type

AbstractThe design optimization and analysis of charged particle beam systems employing intense beams requires a robust and accurate Poisson solver. This paper presents a new type of Poisson solver which allows the effects of space charge to be elegantly included into the system dynamics. This is done by casting the charge distribution function into a series of basis functions, which are then integrated with an appropriate Green's function to find a Taylor series of the potential at a given point within the desired distribution region. In order to avoid singularities, a Duffy transformation is applied, which allows singularity-free integration and maximized convergence region when performed with the help of Differential Algebraic methods. The method is shown to perform well on the examples studied. Practical implementation choices and some of their limitations are also explored.

Fokker–Planck model of charged-particle beam behavior in a strong toroidal magnetic field

2005 ◽  
Vol 6 (3) ◽  
pp. 417-428
Author(s):  
Z. Parsa ◽  
A. Chikrii ◽  
S. Eidelman ◽  
V. Yavorskij ◽  
V. Zadorozhny
Keyword(s):  
Magnetic Field ◽  
Charged Particle ◽  
Particle Beam ◽  
Toroidal Magnetic Field ◽  
Charged Particle Beam ◽  
Fokker Planck

scholarly journals Smith–Purcell radiation in the terahertz regime using charged particle beams from laser–matter interactions

2016 ◽  
Vol 34 (1) ◽  
pp. 187-191 ◽  
Author(s):  
A. Gopal ◽  
A. H. Woldegeorgis ◽  
S. Herzer ◽  
G. G. Paulus ◽  
P. Singh ◽  
...  
Keyword(s):  
Charged Particle ◽  
Laser Pulses ◽  
Particle Beam ◽  
Metal Foil ◽  
Charged Particle Beam ◽  
Particle Beams ◽  
Charged Particle Beams ◽  
Terahertz Pulses ◽  
Radiation Generation ◽  
Foil Target

AbstractWe report on the experimental observation of Smith–Purcell (SP) radiation generation by charged particle beam from laser–matter interactions. High-power laser pulses were focused onto a thin metal foil target to generate proton beams with energies up to 1.7 MeV via the target normal sheath acceleration (TNSA) process. The particle beam from the TNSA process was sent close to a periodic structure to generate SP radiation. Sub-μJ terahertz pulses were recorded using a pyroelectric detector. Simultaneous measurement of the ion spectra allowed us to estimate the power of the emitted radiation and compare it with the experimental results. The distance between the grating and the particle beam was varied and its effect on the emitted radiation was studied.

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